Question: What was the population of Rwanda in 1989?
Paraphrase: which  Rwanda  population  in  the year 1989?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q1037 p:P1082 ?s . ?s ps:P1082 ?obj . ?s pq:P585 ?x filter(contains(YEAR(?x),'1989')) }